added cucumber gem to Gemfile; created AddMovie.feature
added before_save callback to Movie model to capitalize words and trim whitspace from titles
movie model validations added: title must be >= 3 chars; title must be unique. Note: currently runs cleanup_title after validates code. Need to run it before.
fixed movie model title validation to disallow duplicate movies regardless of capitalization, spaces
movie model: use before_validation method to check capitalization/ whitespace
movie model cleanup_title motheod: moved strp to beginning of alteration